<title>麻烦的聚餐</title><link href="http://hzoi.com/tomorrow.css" rel="stylesheet"><div class="ui existing segment"><pre><code><span class="pl-cp">#include</span> <span class="pl-cpf">&lt;algorithm&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#include</span> <span class="pl-cpf">&lt;cstdio&gt;</span><span class="pl-cp"></span>
<span class="pl-cp">#include</span> <span class="pl-cpf">&lt;iostream&gt;</span><span class="pl-cp"></span>
<span class="pl-k">using</span> <span class="pl-k">namespace</span> <span class="pl-n">std</span><span class="pl-p">;</span>
<span class="pl-kt">int</span> <span class="pl-n">a</span><span class="pl-p">[</span><span class="pl-mi">30005</span><span class="pl-p">],</span> <span class="pl-n">b</span><span class="pl-p">[</span><span class="pl-mi">30005</span><span class="pl-p">],</span> <span class="pl-n">dpa</span><span class="pl-p">[</span><span class="pl-mi">30005</span><span class="pl-p">],</span> <span class="pl-n">dpb</span><span class="pl-p">[</span><span class="pl-mi">30005</span><span class="pl-p">];</span>
<span class="pl-k">const</span> <span class="pl-kt">int</span> <span class="pl-n">inf</span> <span class="pl-o">=</span> <span class="pl-mh">0x7f7f7f7f</span><span class="pl-p">;</span>
<span class="pl-kt">int</span> <span class="pl-nf">main</span><span class="pl-p">()</span> <span class="pl-p">{</span>
    <span class="pl-kt">int</span> <span class="pl-n">n</span><span class="pl-p">;</span>
    <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d&quot;</span><span class="pl-p">,</span> <span class="pl-o">&amp;</span><span class="pl-n">n</span><span class="pl-p">);</span>
    <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span> <span class="pl-p">{</span>
        <span class="pl-n">dpa</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-n">dpb</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]</span><span class="pl-o">=</span><span class="pl-n">inf</span><span class="pl-p">;</span>
        <span class="pl-n">scanf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d&quot;</span><span class="pl-p">,</span> <span class="pl-o">&amp;</span><span class="pl-n">a</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]);</span>
        <span class="pl-n">b</span><span class="pl-p">[</span><span class="pl-n">n</span> <span class="pl-o">-</span> <span class="pl-n">i</span> <span class="pl-o">-</span> <span class="pl-mi">1</span><span class="pl-p">]</span> <span class="pl-o">=</span> <span class="pl-n">a</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">];</span>
    <span class="pl-p">}</span>
    <span class="pl-n">dpb</span><span class="pl-p">[</span><span class="pl-n">n</span><span class="pl-p">]</span><span class="pl-o">=</span><span class="pl-n">dpa</span><span class="pl-p">[</span><span class="pl-n">n</span><span class="pl-p">]</span><span class="pl-o">=</span><span class="pl-n">inf</span><span class="pl-p">;</span>
    <span class="pl-k">for</span> <span class="pl-p">(</span><span class="pl-kt">int</span> <span class="pl-n">i</span> <span class="pl-o">=</span> <span class="pl-mi">0</span><span class="pl-p">;</span> <span class="pl-n">i</span> <span class="pl-o">&lt;</span> <span class="pl-n">n</span><span class="pl-p">;</span> <span class="pl-n">i</span><span class="pl-o">++</span><span class="pl-p">)</span> <span class="pl-p">{</span>
        <span class="pl-o">*</span><span class="pl-p">(</span><span class="pl-n">upper_bound</span><span class="pl-p">(</span><span class="pl-n">dpa</span><span class="pl-p">,</span> <span class="pl-n">dpa</span> <span class="pl-o">+</span> <span class="pl-n">n</span><span class="pl-p">,</span> <span class="pl-n">a</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]))</span> <span class="pl-o">=</span> <span class="pl-n">a</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">];</span>
        <span class="pl-o">*</span><span class="pl-p">(</span><span class="pl-n">upper_bound</span><span class="pl-p">(</span><span class="pl-n">dpb</span><span class="pl-p">,</span> <span class="pl-n">dpb</span> <span class="pl-o">+</span> <span class="pl-n">n</span><span class="pl-p">,</span> <span class="pl-n">b</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">]))</span> <span class="pl-o">=</span> <span class="pl-n">b</span><span class="pl-p">[</span><span class="pl-n">i</span><span class="pl-p">];</span>
    <span class="pl-p">}</span>
    <span class="pl-n">printf</span><span class="pl-p">(</span><span class="pl-s">&quot;%d&quot;</span><span class="pl-p">,</span> <span class="pl-n">n</span> <span class="pl-o">-</span> <span class="pl-n">max</span><span class="pl-p">(</span><span class="pl-n">lower_bound</span><span class="pl-p">(</span><span class="pl-n">dpa</span><span class="pl-p">,</span> <span class="pl-n">dpa</span> <span class="pl-o">+</span> <span class="pl-n">n</span><span class="pl-p">,</span> <span class="pl-n">inf</span><span class="pl-p">)</span> <span class="pl-o">-</span> <span class="pl-n">dpa</span><span class="pl-p">,</span><span class="pl-n">lower_bound</span><span class="pl-p">(</span><span class="pl-n">dpb</span><span class="pl-p">,</span> <span class="pl-n">dpb</span> <span class="pl-o">+</span> <span class="pl-n">n</span><span class="pl-p">,</span> <span class="pl-n">inf</span><span class="pl-p">)</span> <span class="pl-o">-</span> <span class="pl-n">dpb</span><span class="pl-p">));</span>
    <span class="pl-k">return</span> <span class="pl-mi">0</span><span class="pl-p">;</span>
<span class="pl-p">}</span>
</cpde></pre></div>